Re: magneto Neptune 0B34

[JOSEPH BRINCAT]

Just in the way of entertainment I’ll relate how the "floating secondary" coil works. We discussed this at length at the coil testing seminar at Constantine this year and the topic seemed of interest. The normal coil that fires a single cylinder ( like the common OMC coils) are constructed such that the secondary (high voltage) winding has one end of the coil connected internally to ground, the other end of the winding goes to the spark plug… pretty straight forward, when the high voltage is induced those little electrons exit the coil jump the spark plug gap and scoot back to the other end of the winding via the ground path of the engine block. NOW with a floating secondary there is NO connection of the secondary windings with ground ( AKA an ungrounded secondary). These coils are used to fire opposed cylinder motors where the two cylinders fire at the same time. So how do those little electrons make it around the circuit? When the coil fires, those little guys (maybe gals too) head out of one end of the secondary winding to spark plug #1 where they jump the gap, then run through the engine block to spark plug #2 , jump that gap (in the opposite direction), then back thru the #2 spark plug wire and finally back to the other end of the secondary winding. So you see the in terms of the speed of light (or electron speed) your simultaneously firing twin is in fact not firing both plugs at the exact same time.
Hope that this helps.
Joe B